fixed bug in jpeg2000 decoding
[swftools.git] / lib / bitio.h
1 /* bitio.h
2    Generic object-oriented reading/writing.
3
4    Part of the swftools package.
5    
6    Copyright (c) 2001 Matthias Kramm <kramm@quiss.org> 
7  
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 2 of the License, or
11    (at your option) any later version.
12
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
21
22 #include <stdio.h>
23 #include "types.h"
24 #include "../config.h"
25
26 #ifdef HAVE_ZZIP
27 #include "zzip/lib.h"
28 #endif
29
30 #ifndef __rfxswf_bitio_h__
31 #define __rfxswf_bitio_h__
32
33 #define READER_TYPE_FILE 1
34 #define READER_TYPE_MEM  2
35 #define READER_TYPE_ZLIB_U 3
36 #define READER_TYPE_ZLIB_C 4
37 #define READER_TYPE_ZLIB READER_TYPE_ZLIB_U
38 #define READER_TYPE_NULL 5
39 #define READER_TYPE_FILE2 6
40 #define READER_TYPE_ZZIP 7
41
42 #define WRITER_TYPE_FILE 1
43 #define WRITER_TYPE_MEM  2
44 #define WRITER_TYPE_ZLIB_C 3
45 #define WRITER_TYPE_ZLIB_U 4
46 #define WRITER_TYPE_NULL 5
47 #define WRITER_TYPE_GROWING_MEM  6
48 #define WRITER_TYPE_ZLIB WRITER_TYPE_ZLIB_C
49
50 typedef struct _reader
51 {
52     int (*read)(struct _reader*, void*data, int len);
53     int (*seek)(struct _reader*, int pos);
54     void (*dealloc)(struct _reader*);
55
56     void *internal;
57     int type;
58     unsigned char mybyte;
59     unsigned char bitpos;
60     int pos;
61 } reader_t;
62
63 typedef struct _writer
64 {
65     int (*write)(struct _writer*, void*data, int len);
66     void (*flush)(struct _writer*);
67     void (*finish)(struct _writer*);
68
69     void *internal;
70     int type;
71     unsigned char mybyte;
72     unsigned char bitpos;
73     int pos;
74 } writer_t;
75
76 void reader_resetbits(reader_t*r);
77 unsigned int reader_readbit(reader_t*r);
78 unsigned int reader_readbits(reader_t*r, int num);
79
80 U8 reader_readU8(reader_t*r);
81 U16 reader_readU16(reader_t*r);
82 U32 reader_readU32(reader_t*r);
83 float reader_readFloat(reader_t*r);
84 double reader_readDouble(reader_t*r);
85 char*reader_readString(reader_t*r);
86
87 void writer_resetbits(writer_t*w);
88 void writer_writebit(writer_t*w, int bit);
89 void writer_writebits(writer_t*w, unsigned int data, int bits);
90
91 void writer_writeU8(writer_t*w, unsigned char b);
92 void writer_writeU16(writer_t*w, unsigned short v);
93 void writer_writeU32(writer_t*w, unsigned long v);
94 void writer_writeFloat(writer_t*w, float f);
95 void writer_writeDouble(writer_t*w, double f);
96 void writer_writeString(writer_t*w, const char*s);
97
98 /* standard readers / writers */
99
100 void reader_init_filereader(reader_t*r, int handle);
101 void reader_init_filereader2(reader_t*r, const char*filename);
102 void reader_init_zlibinflate(reader_t*r, reader_t*input);
103 void reader_init_memreader(reader_t*r, void*data, int length);
104 void reader_init_nullreader(reader_t*r);
105 #ifdef HAVE_ZZIP
106 void reader_init_zzipreader(reader_t*r,ZZIP_FILE*z);
107 #endif
108
109 void writer_init_filewriter(writer_t*w, int handle);
110 void writer_init_filewriter2(writer_t*w, char*filename);
111 void writer_init_zlibdeflate(writer_t*w, writer_t*output);
112 void writer_init_memwriter(writer_t*r, void*data, int length);
113 void writer_init_nullwriter(writer_t*w);
114
115 void writer_init_growingmemwriter(writer_t*r, U32 grow);
116 void* writer_growmemwrite_memptr(writer_t*w, int*len);
117 void* writer_growmemwrite_getmem(writer_t*w);
118 void writer_growmemwrite_reset(writer_t*w);
119
120 #endif //__rfxswf_bitio_h__